Anne K. Brysting, Michael F. Fay, Ilia J. Leitch, S. G. Aiken,
... taxonomic treatments, we investigated the arctic grass genus Dupontia by molecular and cytogenetic methods. Identical plastid DNA ( ... sequences and very similar AFLP profiles indicated that Dupontia and Arctophila are closely related and that the ... involved in a possible intergeneric hybrid origin of Dupontia . Despite the presence of intraindividual rDNA (ITS) variation in Dupontia indicating an allopolyploid hybrid origin of the genus, ... probes. Due to lack of sequence divergence within Dupontia , AFLP fingerprinting was applied to investigate whether any ...
Tópico(s): Genetic diversity and population structure
2004 - Wiley | Taxon
Robert J. Soreng, Lynn J. Gillespie, Hidehisa Koba, Ekaterina A. Boudko, Roger D. Bull,
... DAD) with two circumarctic Poinae genera, Arctophila and Dupontia , in phylogenetic analyses of plastid and nuclear ribosomal ... as a lineage distinct from either Arctophila or Dupontia , with moderate DNA support for a position as ... with frequently awned attenuate scarious apices (as in Dupontia ) and calluses with a crown of hairs around ... for possible secondary hybridization and introgression of duodecaploid Dupontia fisheri with Puccinellia . A key to perennial genera ...
Tópico(s): Chromosomal and Genetic Variations
2015 - Wiley | Journal of Systematics and Evolution
Anne K. Brysting, S. G. Aiken, L. P. Lefkovitch, Ruben Boles,
... apparent discrepancies in recent taxonomic treatments, the genus Dupontia was studied from herbarium specimens, including types and ... used in the literature to divide the genus Dupontia into more than one taxon, cannot be reliably ... treating the genus as monotypic.Key words: Poaceae, Dupontia, morphology, chromosome numbers, conditional clustering, contingency tables.
Tópico(s): Chromosomal and Genetic Variations
2003 - Canadian Science Publishing | Canadian Journal of Botany
Gilles Gauthier, Robert Hughes, Austin Reed, Julien Beaulieu, Line Rochefort,
... reduced the above-ground biomass of Eriophorum and Dupontia. Over the 3 years, we estimated that geese ... 30 to 78% of the cumulative NAPP of Dupontia. Consumption of Dupontia, but not Eriophorum, was related to grazing intensity. ... On an individual plant basis, cumulative NAPP of Dupontia, but not of Eriophorum, was reduced by grazing. ...
Tópico(s): Ecology and Vegetation Dynamics Studies
1995 - Wiley | Journal of Ecology
Lynn J. Gillespie, Robert J. Soreng, Roger D. Bull, Surrey W. L. Jacobs, Nancy Refulio,
... relationships among Nicoraepoa , Hookerochloa , and Arctagrostis ; Arctophila and Dupontia ; and Apera , Bellardiochloa , and Ventenata . Genera of the ... hybrid origins. Nothogenus × Duarctopoa is coined for Arctopoa × Dupontia, with a single nothospecies × Duarctopoa labradorica . A new ...
Tópico(s): Genetic diversity and population structure
2008 - Canadian Science Publishing | Botany
Norman C. Negus, Patricia Berger,
... with the appearance of the first sprouts of Dupontia fisheri and Carex stans, two of its preferred ... contained 6-MBOA but caespitose species did not. Dupontia fisheri showed considerable yearly variation in 6-MBOA ...
Tópico(s): Botany and Plant Ecology Studies
1998 - NRC Research Press | Canadian Journal of Zoology
Christina Wegener, Ann Marie Odasz,
The perennial grass Dupontia fisheri is an important forage for reindeer (Rangifer tarandus platyrhynchus) in Svalbard. In a growth chamber experiment, biomass and ...
Tópico(s): Botany and Plant Ecology Studies
1997 - Wiley | Oikos
Julien Beaulieu, Gilles Gauthier, Line Rochefort,
... ungrazed plants, and the trend was similar in Dupontia. 6 Dupontia and Eriophorum were able to compensate for leaves ...
Tópico(s): Ruminant Nutrition and Digestive Physiology
1996 - Wiley | Journal of Ecology
... concave areas, the toposequence from Puccinellia proceeds through Dupontia → Carex → Salix hummocks → cushion plant–lichen communities. In ... appear important in the conversion of Puccinellia- to Dupontia- to Carex-dominated meadows. This is the major ...
Tópico(s): Polar Research and Ecology
1994 - Canadian Science Publishing | Canadian Journal of Botany
Jacques Cayouette, S. J. Darbyshire,
The new nothogenus × Dupoa (Dupontia × Poa ) is published. Nomenclature of the only known nothospecies, × Dupoa labradorica (= Poa labradorica ), is discussed. Morphology and synecology of this ... with the putative parental taxa, Poa eminens and Dupontia fisheri ssp. psilosantha . Establishment and persistence of this ...
Tópico(s): Botany, Ecology, and Taxonomy Studies
1993 - Wiley | Nordic Journal of Botany
Micheline Manseau, Gilles Gauthier,
... a sedge meadow (dominated by Carex aquatilis and Dupontia fisheri) and a grass meadow (dominated by Dupontia fisheri and Eriophorum spp.). Plant biomass was higher ...
Tópico(s): Rangeland and Wildlife Management
1993 - Wiley | Ecology
Hans Staaland, Nils Are Øritsland, Robert G. White,
... mixture of locally harvested grasses and sedges (mainly Dupontia pelligera and Eriphorum scheusczeri), 3: a pure moss ( ... og siv høstet i Adventdalen (vesentlig Dupontia pelligera og Eriophorum scheuchzeri), 3: en ren mosediett ( ...
Tópico(s): Climate change and permafrost
1988 - Septentrio Academic Publishing | Rangifer
... similar to that of temperate plants. Carex misandra, Dupontia fisheri, and Eriophorum scheuchzeri, however, have relatively high ... 5 to 8 kcal mol-1 for Carex, Dupontia, and Eriophorum. These latter three species possess lower ...
Tópico(s): Soil Carbon and Nitrogen Dynamics
1981 - Taylor & Francis | Arctic and Alpine Research
Douglas A. Johnson, Martyn M. Caldwell,
... and Geum rossii , and two arctic tundra species, Dupontia fischeri and Carex aquatilis , were conducted under varying ... restricted typically to wet meadow areas, Deschampsia and Dupontia , did not exhibit closure until leaf water potential ...
Tópico(s): Geology and Paleoclimatology Research
1976 - Wiley | Physiologia Plantarum
P. J. MATTHEIS, Larry L. Tieszen, Martin C. Lewis,
Preceding flowering, a Dupontia fischeri tiller at Barrow, Alaska, typically grows vegetatively for 3 or 4 years as a member of a system ...
Tópico(s): Animal Ecology and Behavior Studies
1976 - Oxford University Press | Annals of Botany
M. L. Allessio, Larry L. Tieszen,
In Dupontia fischeri R. Br. the pattern of translocation of photosynthetically incorporated 14C was established within six hr after ...
Tópico(s): Pasture and Agricultural Systems
1975 - Wiley | American Journal of Botany
M. L. Allessio, Larry L. Tieszen,
In Dupontia fischeri R. Br. the pattern of translocation of photosynthetically incorporated 14 C was established within six hr ...
Tópico(s): Peatlands and Wetlands Ecology
1975 - Wiley | American Journal of Botany
Natalia Tkach, Julia Schneider, Elke Döring, Alexandra Wölk, Anne Hochbach, Jana Nissen, Grit Winterfeld, Solveig Meyer, Jennifer Gabriel, Matthias H. Hoffmann, Martin Röser,
... C. kochii , C . pisidicum , C. trichopodum , C. verticillatum , Dupontia fulva , Festuca masafuerana , F. robinsoniana , Graphephorum canescens , G. ...
Tópico(s): Genetic diversity and population structure
2020 - Wiley | Taxon
Olga Khitun, Ksenia Ermokhina, Irina V. Czernyadjeva, Marina Leibman, Artem Khomutov,
... Puccinellia sibirica, Calamagrostis holmii, Poa alpigena ssp.colpodea, Dupontia fisheri).Proportion of various species differs both between ...
Tópico(s): Geology and Paleoclimatology Research
2015 - Geographical Society of Finland | Fennia
H Anderson, Thomas George Godfrey, Sarah J. Woodin, René van der Wal,
... forage species characteristic of this habitat, such as Dupontia grasses and the rush Eriophorum scheuchzeri , were more ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2012 - Wiley | Journal of Avian Biology
Lena Ström, Torbern Tagesson, Mikhail Mastepanov, Torben R. Christensen,
... to dominance of other sedges (Carex stans and Dupontia psilosantha). Three groups of LMWOC were analysed using ...
Tópico(s): Coastal wetland ecosystem dynamics
2011 - Elsevier BV | Soil Biology and Biochemistry
Angela Hunter, David A. Orlovich, Kelvin M. Lloyd, W. G. Lee, Daniel J. Murphy,
... hookeriana are placed in a clade containing Arctagrostis, Dupontia, and Arctophila. Whilst Austrofestuca littoralis is nested within ...
Tópico(s): Ruminant Nutrition and Digestive Physiology
2004 - Taylor & Francis | New Zealand Journal of Botany
Lena Ström, Anna Ekberg, Mikhail Mastepanov, Torben R. Christensen,
... another dominating sedge in the wetland, i.e. Dupontia psilosantha . Furthermore a shading treatment, which reduced net ...
Tópico(s): Methane Hydrates and Related Phenomena
2003 - Wiley | Global Change Biology
Mostafa A. Shirazi, Patricia K. Haggerty, Curtis Hendricks, M. Reporter,
... The dominant species were Carex aquatilis, Eriophorum angustifolium, Dupontia fisheri, Poa glauca, Festuca rubra, Salix ovalifolia, S. ...
Tópico(s): Geology and Paleoclimatology Research
1998 - Wiley | Restoration Ecology
Fawziah Gadallah, Robert L. Jefferies,
... nutritional demands of the birds. Two such species, Dupontia fisheri and Arctophila fulva, are known to have ...
Tópico(s): Rangeland and Wildlife Management
1995 - Wiley | Journal of Applied Ecology
Matthew J. Monda, John T. Ratti, Thomas R. McCabe,
... 0.010), did not change for tundra grass (Dupontia fischeri) (P = 0.296), and decreased for chickweed ( ...
Tópico(s): Fish Ecology and Management Studies
1994 - Wiley | Journal of Wildlife Management
... cases of confusion. Special attention is paid to Dupontia fisheri s.l., Carex aquatilis s.l. and ...
Tópico(s): Lichen and fungal ecology
1994 - Wiley | Journal of Vegetation Science
... North Slope. Phosphorus fertilization encouraged Carex aquatilis and Dupontia fisheri recolonizing and replacing of seeded Puccinellia borealis ...
Tópico(s): Peatlands and Wetlands Ecology
1987 - Taylor & Francis | Arctic and Alpine Research
... nearest the sea with Carex ursina, C. stans, Dupontia fisheri, and Alopecurus alpinus dominated zones landward. Soil ...
Tópico(s): Marine and coastal plant biology
1987 - Canadian Science Publishing | Canadian Journal of Botany
Jean‐François Giroux, Yves Bédard, Jean Bédard,
... cm of standing water, dominated by Carex stans, Dupontia fisheri, Calamagrostis neglecta, and Arctagrostis latifolia; and, around ...
Tópico(s): Ecology and Vegetation Dynamics Studies
1984 - Arctic Institute of North America | ARCTIC